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The Splendour of Spinel, part 2: Types and Trea...
Spinel is one of many gemstones for which there are numerous varieties. Just like its cousin corundum, spinel gems can occur in a myriad of different hues Very much like...
The Splendour of Spinel, part 2: Types and Trea...
Spinel is one of many gemstones for which there are numerous varieties. Just like its cousin corundum, spinel gems can occur in a myriad of different hues Very much like...
The Splendour of Spinel, part 1: A Cousin to Co...
Species Spinel Chemical Formula MgAl2O4 Mohs Hardness 7.5 - 8 Cleavage None Luster Vitreous to Subadamantine Refractive Index 1.719 - 1.920 Birefringence None Dispersion 0.020 Pleochroism None Specific Gravity 3.58...
The Splendour of Spinel, part 1: A Cousin to Co...
Species Spinel Chemical Formula MgAl2O4 Mohs Hardness 7.5 - 8 Cleavage None Luster Vitreous to Subadamantine Refractive Index 1.719 - 1.920 Birefringence None Dispersion 0.020 Pleochroism None Specific Gravity 3.58...